package au.org.nh.pdfgen;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id$ */

//Java
import java.io.File;
import java.io.OutputStream;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;

/**
 * This class demonstrates the conversion of an XML file to PDF using JAXP
 * (XSLT) and FOP (XSL-FO).
 */
public class ExampleXML2PDF {

	/**
	 * Main method.
	 * 
	 * @param args
	 *            command-line arguments
	 */
	public static void main(final String[] args) {
		try {
			System.out.println("FOP ExampleXML2PDF\n");
			System.out.println("Preparing...");

			// Setup directories
			final File baseDir = new File("");
			final File outDir = new File("out");
			outDir.mkdirs();

			// Setup input and output files
			final File xmlfile = new File("res/Hello.xml");
			final File xsltfile = new File("res/nh.xsl");
			final File pdffile = new File("ResultXML2PDF.pdf");

			System.out.println("Input: XML (" + xmlfile + ")");
			System.out.println("Stylesheet: " + xsltfile);
			System.out.println("Output: PDF (" + pdffile + ")");
			System.out.println();
			System.out.println("Transforming...");

			// configure fopFactory as desired
			final FopFactory fopFactory = FopFactory.newInstance();

			final FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
			// configure foUserAgent as desired

			// Setup output
			OutputStream out = new java.io.FileOutputStream(pdffile);
			out = new java.io.BufferedOutputStream(out);

			try {
				// Construct fop with desired output format
				final Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF,
						foUserAgent, out);

				// Setup XSLT
				final TransformerFactory factory = TransformerFactory
						.newInstance();
				final Transformer transformer = factory
						.newTransformer(new StreamSource(xsltfile));

				// Set the value of a <param> in the stylesheet
				transformer.setParameter("versionParam", "2.0");

				// Setup input for XSLT transformation
				final Source src = new StreamSource(xmlfile);

				// Resulting SAX events (the generated FO) must be piped through
				// to FOP
				final Result res = new SAXResult(fop.getDefaultHandler());

				// Start XSLT transformation and FOP processing
				transformer.transform(src, res);
			} finally {
				out.close();
			}

			System.out.println("Success!");
		} catch (final Exception e) {
			e.printStackTrace(System.err);
			System.exit(-1);
		}
	}
}